Trunking at Concord Hospital
- Thread starter geoff5093
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ecps92
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If you can ID the LCN Order, the Channels are listed at
New Hampshire Colleges, Hospitals and Misc Security - Scan New England Wiki
New Hampshire Colleges, Hospitals and Misc Security - Scan New England Wiki
How would I go about determining the order of the LCN? I also noticed additional frequencies in the FCC database as part of the Concord Hospital trunk then you have listed on that wiki page.
ecps92
Member
There is a WIKI article on LTR and how to determine the LCN's.
Mapping an LTR System - The RadioReference Wiki
What Call Signs??
The Hospital likely has many different licenses, and not all could be part of the TRS.
New Hampshire Scanner Frequencies and Radio Frequency Reference
The ones with an YG would be the Trunk
The ones with an IG would be straight conventional
the ones with an PW are Special Emergency [Amb-Hosp]
Mapping an LTR System - The RadioReference Wiki
What Call Signs??
The Hospital likely has many different licenses, and not all could be part of the TRS.
New Hampshire Scanner Frequencies and Radio Frequency Reference
The ones with an YG would be the Trunk
The ones with an IG would be straight conventional
the ones with an PW are Special Emergency [Amb-Hosp]
There are 8 YG frequencies with the same call sign. Thanks for the info on LTR, I'll take a look at it and hopefully be able to figure out the order.
Also, kind of off topic, but how do you determine what type of trunking system someone is using if all you have is the data in the FCC database?
ecps92
Member
All 8 might not be in-use, even tho they applied for them.
As for what type, it's basically Trial and Error and/or Listen and hear.
Periodic Clicks when no one is talking on a channel is an LTR
Constant Control Channels would be EDACS or "M"
As for what type, it's basically Trial and Error and/or Listen and hear.
Periodic Clicks when no one is talking on a channel is an LTR
Constant Control Channels would be EDACS or "M"
That makes sense, so when scanning an LTR you wouldn't see a signal strength meter if no one was talking on the system, right? What if you programmed an EDACS or "M" system as an LTR, would you still see the signal strength meter show up, but just not hear any audio?
Hi Geoff,
To follow-up on Bills info, ya have to sit on each frequency for about 30-Seconds. During that time, you should hear a quick "kerchunk" if the frequency is active on the LTR system.
The EDACS & Moto system have a control/data channel, so yes you'd hear it. It just wouldn't do anything for decoding.
As far as the LCN of frequencies in LTR, that's totaly hit/miss. I can't speak for the new Uniden scanners, but the RS Pro-106 can usually do an LTR system without knowing the channel order (not a pro-106 add, just what I know). W/Concord Hospital, what I have so far, was from findig the most active frequency, then putting it first to see if that worked.
BTW, the old conventional frequency is still in service. It's tied to the Call boxes and also contractors sometimes are assigned to it.
To follow-up on Bills info, ya have to sit on each frequency for about 30-Seconds. During that time, you should hear a quick "kerchunk" if the frequency is active on the LTR system.
The EDACS & Moto system have a control/data channel, so yes you'd hear it. It just wouldn't do anything for decoding.
As far as the LCN of frequencies in LTR, that's totaly hit/miss. I can't speak for the new Uniden scanners, but the RS Pro-106 can usually do an LTR system without knowing the channel order (not a pro-106 add, just what I know). W/Concord Hospital, what I have so far, was from findig the most active frequency, then putting it first to see if that worked.
BTW, the old conventional frequency is still in service. It's tied to the Call boxes and also contractors sometimes are assigned to it.
Thanks John, I'll try that out. I programmed them at first in the order they were in the DB, and I can actually hear conversations on those to TGID's. Either by an odd chance I got part of the order right, or the Uniden can decode it without the correct order, just trial and error I guess.
I hear traffic on their conventional frequency only occasionally, typically when a helicopter is landing.
radioman2001
Member
While the kerchunk is a good way to determine if it's an LTR system the kerchunk is optional. Decoding the kerchunks you can figure out the LCN order pretty quick, but most of the systems I have installed I remove the range burst. That's since most owners operators don't stray very far from their systems and don't need it, like a hospital. It's just another thing that can cause the system to fail. The kerchunk can be set to from 1 sec to infinity. 1 second if you want to drive some one nuts or impede conventional scanners from listening. In the FCC database YG means trunking, but you can put LTR on IG channels too. Since most of the new LTR panels have the capability of monitoring the input to prevent call collision.
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